A method for treating waste water from papermaking tobacco sheet production

Abstract

The invention relates to a wastewater treatment method, in particular to a treatment method of papermaking method tobacco sheet production wastewater. The method comprises the following steps: (1) the production wastewater passes through a grid to perform coarse filtration and flows in a wastewater adjusting tank; (2) the wastewater in the wastewater adjusting tank is lifted to a coagulation device by a lift pump, a Ca-diatomite series composite coagulant is added in the coagulation device to react for 5-10 minutes, then polymeric ferric sulfate and polyacrylamide separating agents are added,the mixture enters a static reaction tank to react for 50-60 minutes; (3) the pH value of the low-concentration organic wastewater is adjusted to be less than 7, then the wastewater is pumped in a ultrasonic micro-electrolysis reactor, the chemical oxygen demand substances in the wastewater are fast digested under the combined action of ultrasonic wave and microelectrodes, the reaction time is 30-60 minutes; and (4) then the wastewater is adsorbed with activated carbon and filtered with quartz sand. The method has the advantages of short treatment time and good treatment effect and has wide applicability.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for treating waste water produced by papermaking tobacco flakes. Background technique [0002] Paper-making tobacco flakes is a high-tech technology for the recycling of tobacco waste in the tobacco processing industry. Since the production of the method follows the papermaking process and chemical extraction technology in some process links, it inevitably has the disadvantages of high water consumption and high waste water production. Its characteristics are that the waste water contains a large amount of fiber, and has the characteristics of high chroma, poor biodegradability, and nicotine that is unfavorable to microbial growth. It is a high-concentration and difficult-to-treat organic sewage. [0003] In the existing wastewater treatment technology, the traditional activated sludge method is generally used, and the residence time of the wastewater in the aeration ...

AI Technical Summary

Problems solved by technology

[0003] In the existing wastewater treatment technology, the traditional activated sludge method is generally used, and the residence time of the wastewater in the aeration tank is 6-8 hours. However, the paper-making tobacco sheet enterprise will produce 50-120 tons per ton of sheet production. For organic wastewater, when a large amount of wastewater is treated according to the activated sludge method, due to the shortening of the wastewater residence time, there will be abnormal phenomenon of sludge swelling, which will affect the quality of wastewater treatment

Therefore, in order to adapt to the treatment of a large amount of wastewater, a large amount of land and expensive infrastructure costs are required

Chinese patent CN10133045A discloses that the waste water from the production of tobacco flakes by the papermaking process is classified and reused in the pulping section after one to three stages of filtration. The influence of flake quality

Chinese patent CN1683261A discloses that the waste water produced by papermaking tobacco flakes is firstly treated by coagulation, and the suspended solids are removed by air flotation, and then sent to the aeration tank for aerobic microbial treatment. However, this method has a long treatment process, Defects such as large equipment investment and large floor area

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